PAX8, combined with organ system-specific markers, can collectively serve as a very useful panel to determine the primary site of micropapillary ovarian carcinomas from invasive carcinomas arising from bladder, lung, and breast.

Stain and return service only.
This stain is usually used in conjunction with the melanin stain. If there is question that a melanin stain is positive, a melanin bleach stain will be run. The area of question on the melanin stain will be bleached out.